The pen doesn;t write well.Let me try,( )

The pen doesn;t write well.Let me try,( )
括号里回答：是的,确实不好写.
该怎么填?
The pen writes well.Let me try,so it does.
这个是肯定的,借鉴哈.
否定也用 SO it does 可以用nor吗？